"Motorists really ride on a film of oil, because all the moving parts of the engine are kept slipping over each other by a thin film of oil."
Possibly footage from 1936 Winter Olympics in Germany.
04:18:30:03 late 1930s cross country skiers riding over wood bridge through snowy forest; VS skier riding down hill.
04:18:41:04 Great LS ski jumper in tuck position skiing down long steep ramp of jump; cut to ski jumper flying through the air; LS ski jumper lands jump, camera pans over to audience in bleachers, Nazi flag with swastika insignia hangs by bleachers.
04:18:57:06 Two men on sleds dive head first down track away from camera; VS people riding on sleds; VS of the luges racing through luge course.
04:19:21:21 Great shot sailboat-like sled glides over camera on ice; VS men sledding on sailboat-like sleds; VS ice skating; high-angle pair figure skating.
04:20:06:02 CU ice, blade of figure skate slides up to camera; camera zooms into CU blade of ice skate against ice; CU figure skate blade against ice with superimposed arrows to aid in audio tracks explanation of the physics of ice skating.
04:20:16:24 CU figure skate with moving projection background to make skate appear as though it is gliding over the ice.
04:20:27:20 Boy about 12 slides down slide into pool; formally dressed men women and children on Coney Island ride with boat sliding to shoot into water.
04:21:14:04 CU disembodied arm opens filing cabinet drawer then takes bar of soap and soaps edge of drawer then opens and closes the filing cabinet door.
04:21:21:12 Great shot of the disembarking of a huge late 1930s ocean liner, audience watches as ship enters water.
04:21:48:20 CU scientist for an experiment pours oil for lubrication from a metal kettle onto small ramp then releases a black from top of ramp letting it slide to the bottom.
04:22:15:01 Train engineer lubricating various parts of train.
04:22:30:04 CU disembodied hand dabs finger tip in glass container filled with oil; CU disembodied forefinger with oil on it is pinched together with the thumb; VS scientist does experiment with flywheel bearing and various methods of lubrication.
04:23:55:13 CU of an engine, cover of engine dissolves from shot revealing cross-section of an engine exposing pumping cylinders; VS graphic illustrations of a running engine and the pathway of oil through the engines various parts.
04:24:51:22 Camera zooms in on cross-section of running engine to main bearings, superimposed arrows in shot identify the bearings next to the crank shaft; cut to cartoon illustrating the main bearing receiving oil in a running engine.
04:25:12:09 CU cross-section of a running engine, camera zooms in on the cam shaft; CU valves opening and closing; cartoon of cross-section of running engine.
04:25:24:22 CU running engine; CU oil being poured into gears; VS cartoon of running engine and the locations where oil enters the system.
04:26:02:29 Great shot old locomotive producing large black cloud of smoke heads toward camera alongside tracks; train speeds by camera, “New York Central” painted on side of train.
04:26:13:05 Great shot two men, one greasy mechanic and one filmmaker behind movie camera filming with a stroboscope a running engine; CU SLO MO of oil dripping around spinning crank shaft of engine; cartoon animation shows cross section of running engine with pumping cylinder.
04:28:16:13 Scientist wearing a long white lab coat holds a hose attached to an engine; scientist turns on nozzle of hose and sprays oil from the engine onto a blank blackboard; CU disembodied hand holding hose spraying oil in a somewhat phallic gesture; CU oil spraying on board. VS CU various running engine parts, superimposed over various CU shots is a shot of oil slowly dripping from top to bottom of frame.